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Seasons
Why we have seasons
| Term | Definition |
|---|---|
| Rotation | The spin of an object around its axis |
| Rotation axis | |
| Orbit | |
| Revolution | |
| Solstice | |
| Equinox | |
| Phase | |
| Waxing phase | |
| Waning phase | |
| Umbra | |
| Penumbra | |
| Solar eclipse |